.showcase-section {
    margin-top: 30px;
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.showcase-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.showcase-grid {
    display: grid;
    gap: 16px;
    margin-top: 10px;
}
.showcase-grid.two {
    grid-template-columns: 1fr 1fr;
}
.showcase-grid.three {
    grid-template-columns: 1fr 1fr 1fr;
}
.showcase-grid.four {
    grid-template-columns: 1fr 1fr 1fr 1fr;
}

.showcase-card {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.04);
    transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.4s ease, box-shadow 0.4s ease;
    opacity: 0;
    transform: translateY(20px) scale(0.97);
}
.showcase-card.visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1), transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
                border-color 0.4s ease, box-shadow 0.4s ease;
}
.showcase-card:hover {
    transform: translateY(-6px) scale(1.01);
    border-color: rgba(0, 200, 255, 0.12);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.showcase-card img {
    width: 100%;
    height: auto;
    display: block;
    background: #0a111e;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.8s ease;
}
.showcase-card img.loaded {
    opacity: 1;
}

.showcase-card .card-body {
    padding: 12px 16px 14px;
}
.showcase-card .card-body h4 {
    font-size: 13px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 2px;
}
.showcase-card .card-body p {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.35);
}

.showcase-card .badge-tag {
    display: inline-block;
    font-size: 8px;
    font-weight: 600;
    color: rgba(0, 200, 255, 0.4);
    background: rgba(0, 200, 255, 0.06);
    padding: 1px 10px;
    border-radius: 20px;
    margin-top: 4px;
}

.section-label {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 2px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}
.section-label.visible {
    opacity: 1;
    transform: translateY(0);
}
.section-label .grad {
    background: linear-gradient(135deg, #00c8ff, #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-desc {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.3);
    margin-bottom: 8px;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s 0.05s ease, transform 0.6s 0.05s cubic-bezier(0.22, 1, 0.36, 1);
}
.section-desc.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 购买卡片 ===== */
.purchase-section {
    margin-top: 24px;
    margin-bottom: 24px;
    opacity: 0;
    transform: translateY(20px);
}
.purchase-section.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.purchase-card {
    background: linear-gradient(135deg, rgba(0, 200, 255, 0.05), rgba(124, 58, 237, 0.05));
    border-radius: 20px;
    padding: 24px 28px;
    border: 1px solid rgba(255, 255, 255, 0.04);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    transition: border-color 0.4s ease, box-shadow 0.4s ease;
}
.purchase-card:hover {
    border-color: rgba(0, 200, 255, 0.08);
    box-shadow: 0 8px 32px rgba(0, 200, 255, 0.03);
}

.purchase-left {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}
.purchase-price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-weight: 700;
    color: #fbbf24;
    animation: pricePulse 3s ease-in-out infinite;
}
@keyframes pricePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.02); }
}
.purchase-price .num {
    font-size: 32px;
    font-weight: 900;
}
.purchase-price .unit {
    font-size: 14px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.3);
}

.purchase-qqs {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.qq-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px 8px 14px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 40px;
    color: #fff;
    font-weight: 600;
    font-size: 13px;
    text-decoration: none;
    transition: background 0.3s ease, transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease,
                border-color 0.3s ease;
    cursor: pointer;
}
.qq-btn:hover {
    background: rgba(0, 200, 255, 0.08);
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 24px rgba(0, 200, 255, 0.08);
    border-color: rgba(0, 200, 255, 0.12);
}
.qq-btn svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}
.qq-btn:hover svg {
    transform: rotate(-5deg) scale(1.05);
}

.purchase-right {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    gap: 6px;
}
.purchase-right svg {
    width: 16px;
    height: 16px;
    stroke: rgba(255, 255, 255, 0.2);
    fill: none;
    stroke-width: 2;
}

.footer-bottom {
    margin-top: 20px;
    padding-top: 14px;
    border-top: 1px solid rgba(255, 255, 255, 0.02);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 11px;
    color: rgba(255, 255, 255, 0.1);
    opacity: 0;
    transition: opacity 0.7s 0.1s ease;
}
.footer-bottom.visible {
    opacity: 1;
}
.footer-bottom a {
    color: rgba(255, 255, 255, 0.15);
    text-decoration: none;
    transition: color 0.3s ease;
}
.footer-bottom a:hover {
    color: rgba(255, 255, 255, 0.4);
}